- Arabic and Persian Originals of Metaphysical Terms in the Bahá'í Writings, by Adib Masumian (2024-09). Transliteration with Arabic and Persian script of the words soul, spirit, self, mind, heart, and spirit of faith.
- Bahá'u'lláh's Teachings on Spiritual Reality, Paul Lample, comp. (1996). The quest for spirituality, the spiritual life, material and spiritual reality, the progress of the soul and humanity’s spiritual education.
- Extract from the Súriy-i-Ra'ís about the Nature of the Soul, by Bahá'u'lláh (2002). Paragraphs 29-35 only, published as a standalone page here for ease of reference.
- Immortality and the Human Soul: Lecture Series, by Hooper Dunbar (1989/1990).
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